Middle Valley, Tennessee, United States [CDP]; population was 12,255 in 1990; housing units was 4,297 in 1990; location is 35°11'N 85°11'W; land area is 13.65 square miles (8,737 acres); water area is 1.69 square miles (1,083 acres); FIPS code is 48360 [SourceCBP]